SparkPost outage, 15 January 2026

Delays in sending emails to Microsoft domains

Started
Resolved
27 Jan 2026, 16:33 UTC (after 12 days)
Impact
Minor
Affected
SMTP Delivery - USA, SMTP Delivery - EUROPE

Last update from SparkPost

We continue to receive sporadic reports of outages at Microsoft, as well as delayed mail sending to Microsoft and their related properties. But have seen recovery for most senders. If you are experiencing delays or IP blocks in sending to Microsoft related properties, please open a ticket with your Technical Account Manager or email support@bird.com (or your dedicated support channel if applicable).

27 Jan 2026, 16:33 UTC

Read the full incident on the official SparkPost status page

Is SparkPost down now?

This page is the record of one past incident. For the live status, see Is SparkPost down right now? - it reads the official status page every 2 minutes.

Other SparkPost incidents

  1. Increased message delays in US and EU due to DNS resolution errors

  2. Mail delivery delays

  3. Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only)

  4. Health Score and Cohort data is delayed

  5. Elevated hard bounces for Apple private relay recipients (privaterelay.appleid.com)

  6. Outbound message delivery is delayed/slow for some SparkPost customers (EU hosted only)

  7. Partial Outage and Delivery Issues in US-West-2 Region

  8. There is a delay effecting some mail sending in EU.

All recorded SparkPost incidents